QCA: Qualitative Comparative Analysis

An extensive set of functions to perform Qualitative Comparative Analysis:
crisp sets ('csQCA'), temporal ('tQCA'), multi-value ('mvQCA')
and fuzzy sets ('fsQCA'), using a GUI - graphical user interface.
'QCA' is a methodology that bridges the qualitative and quantitative divide
in social science research. It uses a Boolean algorithm that results in a
minimal causal combination which explains a given phenomenon.